// eliding the final \n or \r\n from the returned string.
func (r *Reader) ReadLine() (string, error) {
	line, err := r.readLineSlice(-1)
	return string(line), err
}

// ReadLineBytes is like [Reader.ReadLine] but returns a []byte instead of a string.
func (r *Reader) ReadLineBytes() ([]byte, error) {
	line, err := r.readLineSlice(-1)
	if line != nil {
		line = bytes.Clone(line)
	}
	return line, err
}